<template>
  <div>
    <div class="goods">
      <div class="menu-wrapper" ref="menuWrapper">
        <ul>
          <li v-for="(item, index) in goods" class="menu-item" :class="{ 'current': currentIndex === index }"
            @click="selectMenu(index, $event)">
            <span class="text border-1px">
              <span v-show="item.type > 0" class="icon" :class="classMap[item.type]"></span>{{ item.name }}
            </span>
          </li>
        </ul>
      </div>
      <div class="foods-wrapper" ref="foodsWrapper">
        <ul>
          <li v-for="item in goods" class="food-list" ref="foodList">
            <h1 class="title">{{ item.name }}</h1>
            <ul>
              <li v-for="food in item.foods" class="food-item border-1px">
                <div class="icon">
                  <img width="57" height="57" :src="food.icon">
                </div>
                <div class="content">
                  <h2 class="name">{{ food.name }}</h2>
                  <p class="desc">{{ food.description }}</p>
                  <div class="extra">
                    <span class="count">月售{{ food.sellCount }}份</span><span>好评率{{ food.rating }}%</span>
                  </div>
                  <div class="price">
                    <span class="now">￥{{ food.price }}</span><span class="old"
                      v-show="food.oldPrice">￥{{ food.oldPrice }}</span>
                  </div>
                  <div class="cartcontrol-wrapper">
                    <cartcontrol @add="addFood" :food="food"></cartcontrol>
                  </div>
                </div>
              </li>
            </ul>
          </li>
        </ul>
      </div>
      <shopcart ref="shopcart" :selectFoods="selectFoods" :deliveryPrice="seller.deliveryPrice"
        :minPrice="seller.minPrice" :seller="seller"></shopcart>
    </div>
    <food @add="addFood" :food="selectedFood" ref="food"></food>
  </div>
</template>

<script type="text/ecmascript-6">
import BScroll from 'better-scroll';
import shopcart from 'components/shopcart/shopcart';
import cartcontrol from 'components/cartcontrol/cartcontrol';
import food from 'components/food/food';
var config = require('config')
config = process.env.NODE_ENV === 'development' ? config.dev : config.build
const ERR_OK = 0;

export default {
  props: {
    seller: {
      type: Object
    }
  },
  data() {
    return {
      selectedFoods: {},
      goods: [],
      listHeight: [],
      scrollY: 0,
      selectedFood: {}
    };
  },
  computed: {
    currentIndex() {
      for (let i = 0; i < this.listHeight.length; i++) {
        let height1 = this.listHeight[i];
        let height2 = this.listHeight[i + 1];
        if (!height2 || (this.scrollY >= height1 && this.scrollY < height2)) {
          return i;
        }
      }
      return 0;
    },
    selectFoods() {
      let foods = [];
      this.goods.forEach((good) => {
        good.foods.forEach((food) => {
          if (food.count) {
            foods.push(food);
          }
        });
      });
      return foods;
    }
  },
  created() {
    //如果url里有openid, 设置进cookie
    var openid = this.$route.query.openid;
    if (typeof openid !== 'undefined') {
      var exp = new Date();
      exp.setTime(exp.getTime() + 3600 * 1000);//过期时间60分钟
      document.cookie = 'openid=' + openid + ";expires=" + exp.toGMTString();
    }
    //获取openid
    if (getCookie('openid') == null) {
      location.href = 'http://h7ea6c68.natappfree.cc/sell/wechat/authorize' + '?returnUrl=' +
        encodeURIComponent('http://127.0.0.1:8088' + '/#/');
    }
    this.classMap = ['decrease', 'discount', 'special', 'invoice', 'guarantee'];
    let selectedGoods = window.selectedGoods;
    selectedGoods = selectedGoods ? JSON.parse(selectedGoods) : [];
    this.$http.get('http://h7ea6c68.natappfree.cc/sell/buyer/product/list').then((response) => {
      response = response.body;
      if (response.code === ERR_OK) {
        selectedGoods.map(item => {
          response.data.map((food, index) => {
            //              console.log(food);
            food.foods.map((foods, i) => {
              // console.log(foods, item);
              if (foods.id === item.id) {
                food.foods.splice(i, 1, Object.assign(food.foods[i], { count: item.count }));
                // food.foods[i].count = item.count;
                response.data.splice(index, 1, food);
              }
            });
          });
        });
        this.goods = response.data;
        //          console.log('hello world', this.goods);
        this.$nextTick(() => {
          this._initScroll();
          this._calculateHeight();
        });
      }
    });
  },
  methods: {
    selectMenu(index, event) {
      if (!event._constructed) {
        return;
      }
      let foodList = this.$refs.foodList;
      let el = foodList[index];
      this.foodsScroll.scrollToElement(el, 300);
    },
    selectFood(food, event) {
      if (!event._constructed) {
        return;
      }
      this.selectedFood = food;
      this.$refs.food.show();
    },
    addFood(target, food) {
      this._drop(target);
    },
    _drop(target) {
      // 体验优化,异步执行下落动画
      this.$nextTick(() => {
        this.$refs.shopcart.drop(target);
      });
    },
    _initScroll() {
      this.meunScroll = new BScroll(this.$refs.menuWrapper, {
        click: true
      });

      this.foodsScroll = new BScroll(this.$refs.foodsWrapper, {
        click: true,
        probeType: 3
      });

      this.foodsScroll.on('scroll', (pos) => {
        this.scrollY = Math.abs(Math.round(pos.y));
      });
    },
    _calculateHeight() {
      let foodList = this.$refs.foodList;
      let height = 0;
      this.listHeight.push(height);
      for (let i = 0; i < foodList.length; i++) {
        let item = foodList[i];
        height += item.clientHeight;
        this.listHeight.push(height);
      }
    }
  },
  components: {
    shopcart,
    cartcontrol,
    food
  }
};

function getCookie(name) {
  var arr;
  var reg = new RegExp('(^| )' + name + "=([^;]*)(;|$)");
  if (arr = document.cookie.match(reg))
    return unescape(arr[2]);
  else
    return null;
}
</script>

<style lang="stylus" rel="stylesheet/stylus">
  @import "../../common/stylus/mixin.styl"

  .goods
    display: flex
    position: absolute
    top: 174px
    bottom: 46px
    width: 100%
    overflow: hidden
    .menu-wrapper
      flex: 0 0 80px
      width: 80px
      background: #f3f5f7
      .menu-item
        display: table
        height: 54px
        width: 56px
        padding: 0 12px
        line-height: 14px
        &.current
          position: relative
          z-index: 10
          margin-top: -1px
          background: #fff
          font-weight: 700
          .text
            border-none()
        .icon
          display: inline-block
          vertical-align: top
          width: 12px
          height: 12px
          margin-right: 2px
          background-size: 12px 12px
          background-repeat: no-repeat
          &.decrease
            bg-image('decrease_3')
          &.discount
            bg-image('discount_3')
          &.guarantee
            bg-image('guarantee_3')
          &.invoice
            bg-image('invoice_3')
          &.special
            bg-image('special_3')
        .text
          display: table-cell
          width: 56px
          vertical-align: middle
          border-1px(rgba(7, 17, 27, 0.1))
          font-size: 12px
    .foods-wrapper
      flex: 1
      .title
        padding-left: 14px
        height: 26px
        line-height: 26px
        border-left: 2px solid #d9dde1
        font-size: 12px
        color: rgb(147, 153, 159)
        background: #f3f5f7
      .food-item
        display: flex
        margin: 18px
        padding-bottom: 18px
        border-1px(rgba(7, 17, 27, 0.1))
        &:last-child
          border-none()
          margin-bottom: 0
        .icon
          flex: 0 0 57px
          margin-right: 10px
        .content
          flex: 1
          .name
            margin: 2px 0 8px 0
            height: 14px
            line-height: 14px
            font-size: 14px
            color: rgb(7, 17, 27)
          .desc, .extra
            line-height: 10px
            font-size: 10px
            color: rgb(147, 153, 159)
          .desc
            line-height: 12px
            margin-bottom: 8px
          .extra
            .count
              margin-right: 12px
          .price
            font-weight: 700
            line-height: 24px
            .now
              margin-right: 8px
              font-size: 14px
              color: rgb(240, 20, 20)
            .old
              text-decoration: line-through
              font-size: 10px
              color: rgb(147, 153, 159)
          .cartcontrol-wrapper
            position: absolute
            right: 0
            bottom: 12px
</style>
